2 + 2 + 2 + ... + 2 = ?

1.	2 + 2 + 2 + ... + 2 = ?
Answer» This is a G.P. in which a = 2, r = 22 = 2 and n = 9. 2 Sn = a(rn - 1) = 2 x (29 - 1) = 2 x (512 - 1) = 2 x 511 = 1022. (r - 1) (2 - 1)

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